western diamondback rattlesnake or texas diamond-back (crotalus atrox)and member of the viper family,

southwestern diamondback rattlesnake herpetology coldblooded horizontal sidewinder dangerous poisonous defensive crotalus atroxand venomous wildlife predator western species reptile arizona closeup zoology rattler biology ecology member family united states mexico animal poison nature danger desert rattle tongue deadly coiled timber fierce texas viper atrox found snake scale venom fauna toxic wild area skin fear usa eye